run-mypy: Remove requirement to be inside a Zulip venv.
run-mypy: Remove requirement to be inside a Zulip venv.

It can be nice to just install+run mypy from outside.

showell/zulip,tommyip/zulip,rishig/zulip,showell/zulip,jackrzhang/zulip,brainwane/zulip,brockwhittaker/zulip,jackrzhang/zulip,andersk/zulip,rishig/zulip,kou/zulip,verma-varsha/zulip,kou/zulip,mahim97/zulip,synicalsyntax/zulip,andersk/zulip,timabbott/zulip,rishig/zulip,shubhamdhama/zulip,amanharitsh123/zulip,eeshangarg/zulip,dhcrzf/zulip,synicalsyntax/zulip,hackerkid/zulip,Galexrt/zulip,synicalsyntax/zulip,vaidap/zulip,vaidap/zulip,rht/zulip,amanharitsh123/zulip,hackerkid/zulip,rht/zulip,brockwhittaker/zulip,shubhamdhama/zulip,eeshangarg/zulip,tommyip/zulip,brockwhittaker/zulip,shubhamdhama/zulip,synicalsyntax/zulip,rishig/zulip,amanharitsh123/zulip,andersk/zulip,timabbott/zulip,jackrzhang/zulip,rht/zulip,shubhamdhama/zulip,amanharitsh123/zulip,andersk/zulip,amanharitsh123/zulip,punchagan/zulip,verma-varsha/zulip,dhcrzf/zulip,brainwane/zulip,verma-varsha/zulip,brainwane/zulip,zulip/zulip,rishig/zulip,zulip/zulip,verma-varsha/zulip,synicalsyntax/zulip,rht/zulip,hackerkid/zulip,hackerkid/zulip,eeshangarg/zulip,andersk/zulip,rishig/zulip,andersk/zulip,brainwane/zulip,synicalsyntax/zulip,eeshangarg/zulip,rht/zulip,showell/zulip,showell/zulip,Galexrt/zulip,synicalsyntax/zulip,tommyip/zulip,brainwane/zulip,dhcrzf/zulip,brockwhittaker/zulip,timabbott/zulip,mahim97/zulip,amanharitsh123/zulip,jackrzhang/zulip,vaidap/zulip,kou/zulip,Galexrt/zulip,andersk/zulip,eeshangarg/zulip,mahim97/zulip,rishig/zulip,punchagan/zulip,dhcrzf/zulip,verma-varsha/zulip,Galexrt/zulip,hackerkid/zulip,Galexrt/zulip,Galexrt/zulip,tommyip/zulip,jackrzhang/zulip,vaidap/zulip,jackrzhang/zulip,verma-varsha/zulip,showell/zulip,timabbott/zulip,rht/zulip,Galexrt/zulip,zulip/zulip,mahim97/zulip,mahim97/zulip,dhcrzf/zulip,jackrzhang/zulip,brainwane/zulip,mahim97/zulip,brockwhittaker/zulip,tommyip/zulip,punchagan/zulip,brainwane/zulip,hackerkid/zulip,timabbott/zulip,tommyip/zulip,punchagan/zulip,rht/zulip,hackerkid/zulip,dhcrzf/zulip,eeshangarg/zulip,showell/zulip,kou/zulip,punchagan/zulip,zulip/zulip,eeshangarg/zulip,zulip/zulip,vaidap/zulip,punchagan/zulip,timabbott/zulip,brockwhittaker/zulip,dhcrzf/zulip,vaidap/zulip,kou/zulip,zulip/zulip,zulip/zulip,shubhamdhama/zulip,showell/zulip,kou/zulip,shubhamdhama/zulip,tommyip/zulip,kou/zulip,punchagan/zulip,timabbott/zulip,shubhamdhama/zulip